[INFO] cloning repository https://github.com/adek05/AdventOfCode2020
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/adek05/AdventOfCode2020" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fadek05%2FAdventOfCode2020", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fadek05%2FAdventOfCode2020'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] dd3cf77ebb3c9f0f93e902a7ae6a3ffe8a2b6d0b
[INFO] testing adek05/AdventOfCode2020 against 1.54.0 for beta-1.55-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fadek05%2FAdventOfCode2020" "/workspace/builds/worker-68/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-68/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/adek05/AdventOfCode2020 on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/adek05/AdventOfCode2020
[INFO] finished tweaking git repo https://github.com/adek05/AdventOfCode2020
[INFO] tweaked toml for git repo https://github.com/adek05/AdventOfCode2020 written to /workspace/builds/worker-68/source/Cargo.toml
[INFO] crate git repo https://github.com/adek05/AdventOfCode2020 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded strcursor v0.2.5
[INFO] [stderr]   Downloaded scan-rules v0.2.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-68/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-68/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 34051e2440e9575555f0fe4c4ca2cf9f89a48e712d6a471c85a5f7547e1678ff
[INFO] running `Command { std: "docker" "start" "-a" "34051e2440e9575555f0fe4c4ca2cf9f89a48e712d6a471c85a5f7547e1678ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "34051e2440e9575555f0fe4c4ca2cf9f89a48e712d6a471c85a5f7547e1678ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "34051e2440e9575555f0fe4c4ca2cf9f89a48e712d6a471c85a5f7547e1678ff", kill_on_drop: false }`
[INFO] [stdout] 34051e2440e9575555f0fe4c4ca2cf9f89a48e712d6a471c85a5f7547e1678ff
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-68/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-68/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b0c232f949fe381a24eb990496b19b87e3a40cb5f02dc19f3e8051e2dfb307eb
[INFO] running `Command { std: "docker" "start" "-a" "b0c232f949fe381a24eb990496b19b87e3a40cb5f02dc19f3e8051e2dfb307eb", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling semver v0.1.20
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling unicode-segmentation v0.1.2
[INFO] [stderr]    Compiling regex-syntax v0.6.21
[INFO] [stderr]    Compiling either v1.6.1
[INFO] [stderr]    Compiling lazy_static v0.1.16
[INFO] [stderr]    Compiling itertools v0.4.19
[INFO] [stderr]    Compiling itertools v0.9.0
[INFO] [stderr]    Compiling rustc_version v0.1.7
[INFO] [stderr]    Compiling thread_local v1.0.1
[INFO] [stderr]    Compiling aho-corasick v0.7.15
[INFO] [stderr]    Compiling strcursor v0.2.5
[INFO] [stderr]    Compiling scan-rules v0.2.0
[INFO] [stderr]    Compiling regex v1.4.2
[INFO] [stderr]    Compiling AdventOfCode2020 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/allergen_assessment.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(iterator_fold_self)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> src/crab_cups.rs:25:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | /     loop {
[INFO] [stdout] 13 | |         current_cup -= 1;
[INFO] [stdout] 14 | |         if current_cup == 0 {
[INFO] [stdout] 15 | |             current_cup = modulo;
[INFO] [stdout] ...  |
[INFO] [stdout] 23 | |         }
[INFO] [stdout] 24 | |     }
[INFO] [stdout]    | |_____- any code following this expression is unreachable
[INFO] [stdout] 25 |       panic!("Unreachable");
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout]    = note: this warning originates in the macro `panic` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `fold_first` found for struct `Map` in the current scope
[INFO] [stdout]   --> src/allergen_assessment.rs:56:18
[INFO] [stdout]    |
[INFO] [stdout] 56 |                 .fold_first(|acc, p| acc.intersection(&p).cloned().collect())
[INFO] [stdout]    |                  ^^^^^^^^^^ method not found in `Map<Filter<std::slice::Iter<'_, Product>, [closure@src/allergen_assessment.rs:54:25: 54:72]>, [closure@src/allergen_assessment.rs:55:22: 55:59]>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0599.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `AdventOfCode2020`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: unused variable: `other`
[INFO] [stdout]   --> src/jurassic_jigsaw.rs:89:40
[INFO] [stdout]    |
[INFO] [stdout] 89 |         ("Tile", let tile_no: usize, ..other) => tile_no
[INFO] [stdout]    |                                        ^^^^^ help: if this is intentional, prefix it with an underscore: `_other`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "b0c232f949fe381a24eb990496b19b87e3a40cb5f02dc19f3e8051e2dfb307eb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b0c232f949fe381a24eb990496b19b87e3a40cb5f02dc19f3e8051e2dfb307eb", kill_on_drop: false }`
[INFO] [stdout] b0c232f949fe381a24eb990496b19b87e3a40cb5f02dc19f3e8051e2dfb307eb
